EP2522948B1 - Pyrotechnically weakenable connection between two elements - Google Patents

Pyrotechnically weakenable connection between two elements Download PDF

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Publication number
EP2522948B1
EP2522948B1 EP12165898.3A EP12165898A EP2522948B1 EP 2522948 B1 EP2522948 B1 EP 2522948B1 EP 12165898 A EP12165898 A EP 12165898A EP 2522948 B1 EP2522948 B1 EP 2522948B1
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EP
European Patent Office
Prior art keywords
actuator
spindle
connecting element
thrust
pyrotechnic component
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Not-in-force
Application number
EP12165898.3A
Other languages
German (de)
French (fr)
Other versions
EP2522948A3 (en
EP2522948A2 (en
Inventor
Johann Huber
Ludwig Stadler
Axel Ringeisen
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Bayern Chemie Gesellschaft fuer Flugchemische Antriebe mbH
Original Assignee
Bayern Chemie Gesellschaft fuer Flugchemische Antriebe mbH
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Publication of EP2522948A2 publication Critical patent/EP2522948A2/en
Publication of EP2522948A3 publication Critical patent/EP2522948A3/en
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F42—AMMUNITION; BLASTING
    • F42B—EXPLOSIVE CHARGES, e.g. FOR BLASTING, FIREWORKS, AMMUNITION
    • F42B3/00—Blasting cartridges, i.e. case and explosive
    • F42B3/006—Explosive bolts; Explosive actuators
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B64—AIRCRAFT; AVIATION; COSMONAUTICS
    • B64C—AEROPLANES; HELICOPTERS
    • B64C27/00—Rotorcraft; Rotors peculiar thereto
    • B64C27/006—Safety devices
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B64—AIRCRAFT; AVIATION; COSMONAUTICS
    • B64C—AEROPLANES; HELICOPTERS
    • B64C27/00—Rotorcraft; Rotors peculiar thereto
    • B64C27/54—Mechanisms for controlling blade adjustment or movement relative to rotor head, e.g. lag-lead movement
    • B64C27/58—Transmitting means, e.g. interrelated with initiating means or means acting on blades
    • B64C27/59—Transmitting means, e.g. interrelated with initiating means or means acting on blades mechanical
    • B64C27/605—Transmitting means, e.g. interrelated with initiating means or means acting on blades mechanical including swash plate, spider or cam mechanisms
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16P—SAFETY DEVICES IN GENERAL; SAFETY DEVICES FOR PRESSES
    • F16P5/00—Emergency means for rendering ineffective a coupling conveying reciprocating movement if the motion of the driven part is prematurely resisted
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R24/00—Two-part coupling devices, or either of their cooperating parts, characterised by their overall structure
    • H01R24/28—Coupling parts carrying pins, blades or analogous contacts and secured only to wire or cable
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R35/00—Flexible or turnable line connectors, i.e. the rotation angle being limited
    • H01R35/04—Turnable line connectors with limited rotation angle with frictional contact members
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B31/00—Screwed connections specially modified in view of tensile load; Break-bolts
    • F16B31/005—Breakbolts loosening due to the action of an explosive charge
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B7/00—Connections of rods or tubes, e.g. of non-circular section, mutually, including resilient connections
    • F16B7/18—Connections of rods or tubes, e.g. of non-circular section, mutually, including resilient connections using screw-thread elements
    • F16B7/182—Connections of rods or tubes, e.g. of non-circular section, mutually, including resilient connections using screw-thread elements for coaxial connections of two rods or tubes
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R2103/00—Two poles

Definitions

  • the invention relates to a device for the mechanical connection of an actuator with an axially driven by the actuator thrust element.
  • a puller having a pin is known in which an element, such as a pin or shaft, is moved by a nonpyrotechnical actuator such as a spring.
  • the actuator is held in the compressed and loaded position by a release mechanism, such as a detonator, which interacts with a holder.
  • a release mechanism such as a detonator
  • the prior art according to US 3,024,592 relates to an actuator, and more particularly to a pin actuator that is lightweight, compact, reliable, and has a high power-to-weight ratio, and a design that makes the device adaptable to varying strokes and forces.
  • a pyromechanical unlocking device with a housing, a pyrotechnic ignition element connected to the housing and a locking element, which can be moved by being acted upon by the ignition element relative to the housing and from a locking position into an unlocking position is known.
  • the unlocking is done by a blasting of the locking element.
  • the invention has for its object to provide a separator for interrupting the flow of force to actuators, which is less prone to failure of the above factors.
  • the device comprises an actuator, a thrust element which is driven axially by the actuator, at least one connecting element which connects the actuator and the thrust element and which is arranged between the actuator and the thrust element, at least one pyrotechnic component comprising at least one Ignition unit and at least one pyrotechnic charge, wherein the pyrotechnic component is arranged such in that the hot gas which can be generated by the latter is directed onto the at least one connecting element, and wherein the at least one connecting element can be weakened by the hot gas which can be generated by the at least one pyrotechnic component such that the pushing element can be separated from the actuator.
  • a preferred embodiment of the device is characterized in that the connecting element of the hot gas is at least partially um- and / or flowed through.
  • the connecting element is designed as a hollow rivet.
  • the connecting element may be formed by other components, which preferably have an at least partially continuous opening, through which the hot gas which can be generated by the pyrotechnic component can be flowed through and / or through.
  • the connecting element has a large contact surface with respect to the hot gas.
  • a further preferred embodiment of the device is characterized in that the connecting element can be deformed by the hot gas that can be generated by the pyrotechnic component in such a way that the axial direction of the actuator can be moved independently of the pushing element.
  • the hot gas which can be generated by the pyrotechnic component is preferably directed onto the connecting element in such a way that it deforms in such a way as to separate the mechanical connection between the pushing element and the actuator formed by the connecting element, or the connecting element melts or evaporates through the hot gas and thus solves the mechanical connection between the thrust element and the actuator.
  • a further preferred embodiment of the device is characterized in that the actuator has a spindle which is movable in the axial direction by the actuator.
  • the spindle is designed as a hollow spindle, hollow piston or full spindle.
  • a preferred embodiment of the device is characterized in that the at least one connecting element between the spindle and the thrust element is arranged.
  • the thrust element is mechanically connected via at least one connecting element with the spindle, so that an axial movement of the spindle is transmitted directly to the thrust element.
  • a further preferred embodiment of the device is characterized in that a plurality of connecting elements between the actuator or the spindle and the thrust element are arranged.
  • the connecting elements are arranged in this case in the radial or axial direction about the connection region between the actuator or spindle and the thrust element.
  • a preferred embodiment of the device is characterized in that each connecting element is assigned in each case a pyrotechnic component.
  • a further preferred embodiment of the device is characterized in that a plurality of connecting elements are associated with a pyrotechnic component.
  • the hot gas that can be generated by the pyrotechnic component can be conducted to a plurality of connecting elements.
  • the hot gas that can be generated by the pyrotechnic component is preferably directed onto the respective connecting elements by one or more beam deflections.
  • a further preferred embodiment of the device is characterized in that the connecting element and / or the pyrotechnic component are sealed by at least one sealing element to the outside.
  • a preferred embodiment of the device is characterized in that the thrust element is designed as a push rod or push tube.
  • a further preferred embodiment of the device is characterized in that the actuator with the thrust element at least by reactivation of the pyrotechnic component and by attaching at least one new connecting element is connectable again.
  • the device is preferably designed in such a way that the connecting element deformed or melted out or vaporized by the hot gas can be replaced by a new connecting element.
  • the pyrotechnic component is preferably also designed such that at least the pyrotechnic charge and possibly the ignition unit must be replaced or renewed. The separate thrust element and spindle or actuator can thus be easily mechanically interconnected again.
  • the device described above is suitable for use in controlling a Swash plate, as used for example for direction control of a helicopter, wherein the controller has in each direction at least two devices described above.
  • the blocked device is separable by activation of the pyrotechnic component.
  • the second device for controlling the swash plate is still usable.
  • the device described above is particularly suitable for redundant, for example, double-dimensioned, for example, axially movable machine elements in order to avoid a total failure of the machine in blockade of one of the two devices.
  • the advantage of the device according to the invention for the mechanical connection of an actuator with an axially driven by the actuator thrust element is that they are less susceptible to contamination, corrosion, wear of the assemblies or to changes in the coefficient of friction of the balls or jaws to each other and by the above-described construction thereby having a higher reliability.
  • FIG. 1 a first embodiment of the device 1 according to the invention is shown.
  • the device comprises an actuator, a thrust element which is driven axially by the actuator, at least one connecting element which connects the actuator and the thrust element and which is arranged between the actuator and the thrust element, at least one pyrotechnic component comprising at least one Ignition unit and at least one pyrotechnic charge, wherein the pyrotechnic component is arranged such that the hot gas produced by this is directed to the at least one connecting element, and wherein the at least one connecting element is weakened by the at least one pyrotechnic component generated by the hot gas such that the push element is separable from the actuator.
  • a mechanical actuator 2 with a thrust element 3 in the axial direction is connected such that upon axial movement of the movable part of the actuator 2, which is formed in the illustrated embodiment by a spindle 21, the thrust element 3 is moved axially ,
  • the actuator 2 comprises a fixed drive 22 and a spindle movable in the axial direction 21.
  • the spindle 21 is formed in the illustrated embodiment as a hollow spindle.
  • the spindle 21 is mechanically connected to a push element 3 in the form of a push rod 31 via a connecting element 4.
  • the push rod 31 is partially disposed in a bore in the hollow spindle 21.
  • the push rod 31 is connected to the spindle 21 only by means of a connecting element 4.
  • the device may also have a plurality of connecting elements 4, which connect the spindle 21 with the thrust element 3.
  • the drive 22 may be formed, for example, as a roller screw drive.
  • the device 1 can be used where a mechanical control by means of an axially driven thrust element 3 via an actuator 2 is designed to be redundant. In the blockade of one of these thrust elements 3 or the other thrust elements 3 is also blocked.
  • the device 1 has a pyrotechnic component 5.
  • the pyrotechnic component 5 has an ignition unit 51, by means of which at least one pyrotechnic charge 52 can be activated.
  • the pyrotechnic charge 52 generates a very hot gas at high pressure when activated.
  • the pyrotechnic component 5 is designed in such a way that the hot gas generated by the activated pyrotechnic charge 52 is directed in the direction of the connecting element 4.
  • the hot gas flows around and / or flows through the connecting element 4, so that it deforms or at least partially dissolves in such a way that the mechanical connection between the spindle 21 and the push rod 31 is interrupted. After the separation of the push rod 31 of the spindle 21, the redundant thrust element is freely movable again and the control is no longer blocked.
  • the connecting element 4 is designed, for example, as a hollow rivet, through which the hot gas can easily flow.
  • at least the connecting element 4 is sealed to the outside by a sealing element, so that no dirt in eg the rivet can penetrate and can prevent melting.
  • the pyrotechnic component 5 has one or more contact connections 54.
  • the pyrotechnic component 5 is sealed to the outside against penetrating impurities.
  • FIG. 2 a further embodiment of the device 1 according to the invention is shown.
  • the spindle 21 is designed as a full spindle and is arranged stationary.
  • the spindle 21 does not move in the axial direction but has only one rotational movement.
  • the spindle 21 is driven by a drive 22.
  • a spindle member 23 is arranged, which is axially movable during rotation of the spindle 21.
  • the spindle element 23 is connected via one or more connecting elements 4 with a pushing element 3, in the form of a push tube 32. In an axial movement of the spindle member 23 by rotation of the spindle 21, the torque tube 23 is moved axially.
  • the device 1 has one or more pyrotechnic components 5.
  • the pyrotechnic charge 52 of the pyrotechnic component 5 Upon activation of the ignition unit 51, the pyrotechnic charge 52 of the pyrotechnic component 5 generates hot gases.
  • the hot gases are, inter alia, by one or more beam deflections 53 on the connecting element 4th directed. Furthermore, the beam deflectors 53 ensure that the spindle 21 is not damaged by the hot gases. Due to the hot gases of the pyrotechnic component 5, the connecting element 4 is deformed or dissolved such that the mechanical connection between the torque tube 32 and the spindle element 23 and thus to the spindle 21 is separated.
  • the connecting element 4 or the pyrotechnic component 5 are preferably sealed off by sealing elements 6 against penetrating impurities.
  • the pyrotechnic component 5 is reactivated, for example by introducing a new pyrotechnic charge 52, and one or more new connecting elements 4 are fitted between spindle 21 or spindle element 23 and thrust element 3.
  • the device 1 is preferably suitable for the separation of mechanically interconnected components that must be quickly separated from each other.
  • the device is in a redundant drive, for example, a swash plate of a helicopter to prevent blocking of the redundant controls.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Actuator (AREA)

Description

Die Erfindung betrifft eine Vorrichtung zur mechanischen Verbindung eines Aktuators mit einem von dem Aktuator axial angetriebenen Schubelement.The invention relates to a device for the mechanical connection of an actuator with an axially driven by the actuator thrust element.

Aus der WO02/35505 ist eine einen Stift aufweisende Zugvorrichtung bekannt, bei der ein Element, wie beispielsweise ein Stift oder eine Welle, durch ein nichtpyrotechnisches Betätigungsglied, beispielsweise eine Feder, bewegt wird. Das Betätigungsglied ist in der komprimierten und belasteten Position gehalten durch einen Freigabemechanismus, beispielsweise einen Sprengbolzen, der mit einem Halter wechselwirkt. Durch ein Signal wird der Freigabemechanismus von dem Halter durchtrennt und das Element durch die Kraft des Betätigungsglieds betätigt.From the WO02 / 35505 For example, a puller having a pin is known in which an element, such as a pin or shaft, is moved by a nonpyrotechnical actuator such as a spring. The actuator is held in the compressed and loaded position by a release mechanism, such as a detonator, which interacts with a holder. By a signal, the release mechanism is severed by the holder and the element is actuated by the force of the actuator.

Der Stand der Technik gemäß US 3,024,592 bezieht sich auf eine Betätigungsvorrichtung und insbesondere auf eine Stiftbetätigungsvorrichtung, die ein geringes Gewicht, kompakt, zuverlässig und verfügt über ein großes Leistungsgewicht, und mit einem Design, das die Vorrichtung anpassungsfähig an variierende Hubmaßnahmen und Kräfte macht.The prior art according to US 3,024,592 relates to an actuator, and more particularly to a pin actuator that is lightweight, compact, reliable, and has a high power-to-weight ratio, and a design that makes the device adaptable to varying strokes and forces.

Aus der EP 1 882 621 ist eine pyromechanische Entriegelungsvorrichtung mit einem Gehäuse, einem mit dem Gehäuse verbundenen pyrotechnischen Zündelement und einem Verriegelungselement, welches durch Beaufschlagung durch das Zündelement relativ zu dem Gehäuse bewegbar und aus einer Verriegelungslage in eine Entriegelungslage bringbar ist, bekannt. Die Entriegelung erfolgt durch eine Absprengung des Verriegelungselements.From the EP 1 882 621 is a pyromechanical unlocking device with a housing, a pyrotechnic ignition element connected to the housing and a locking element, which can be moved by being acted upon by the ignition element relative to the housing and from a locking position into an unlocking position is known. The unlocking is done by a blasting of the locking element.

Aus dem Stand der Technik sind weiterhin mechanische oder elektromechanische Axialkupplungen bekannt, die über entsperrbare Kugeln oder Klauen den axialen Kraftfluss an Aktuatoren unterbrechen. Derartige Baugruppen bestehen oft aus einer größeren Anzahl von Bauteilen, die im Funktionsfall gegeneinander verschoben werden. Die Funktion derartiger Vorrichtungen ist jedoch besonders störanfällig gegenüber Verschmutzungen, Korrosion, Verschleiß der Baugruppen bzw. gegenüber Änderungen des Reibfaktors der Kugeln oder Klauen zueinander, ferner Vibrationen.Mechanical or electromechanical axial couplings are also known from the prior art, which interrupt the axial force flow to actuators via unlockable balls or claws. Such assemblies often consist of a larger number of components that are moved against each other in the functional case. However, the function of such devices is particularly susceptible to contamination, corrosion, wear of the modules or to changes in the coefficient of friction of the balls or claws each other, further vibrations.

Vor diesem Hintergrund liegt der Erfindung die Aufgabe zugrunde, eine Trennvorrichtung zur Unterbrechung des Kraftflusses an Aktuatoren anzugeben, die weniger störungsanfällig gegenüber den oben genannten Faktoren ist.Against this background, the invention has for its object to provide a separator for interrupting the flow of force to actuators, which is less prone to failure of the above factors.

Die Lösung dieser Aufgabe ergibt sich aus den Merkmalen des Hauptanspruchs, während vorteilhafte Ausgestaltungen und Weiterbildungen der Erfindung den Unteransprüchen entnehmbar sind.The solution of this problem arises from the features of the main claim, while advantageous embodiments and further developments of the invention are the dependent claims can be removed.

Die erfindungsgemäße Vorrichtung weist auf einen Aktuator, ein Schubelement, das axial von dem Aktuator angetrieben wird, wenigstens ein Verbindungselement, das den Aktuator und das Schubelement verbindet, und das zwischen dem Aktuator und dem Schubelement angeordnet ist, wenigstens ein pyrotechnisches Bauteil, aufweisend wenigstens eine Zündeinheit und wenigstens eine pyrotechnische Ladung, wobei das pyrotechnische Bauteil derart angeordnet ist, dass das von diesem erzeugbare Heißgas auf das wenigstens eine Verbindungselement gerichtet ist, und wobei das wenigstens eine Verbindungselement durch das von dem wenigstens einen pyrotechnischen Bauteil erzeugbare Heißgas derart schwächbar ist, dass das Schubelement von dem Aktuator trennbar ist.The device according to the invention comprises an actuator, a thrust element which is driven axially by the actuator, at least one connecting element which connects the actuator and the thrust element and which is arranged between the actuator and the thrust element, at least one pyrotechnic component comprising at least one Ignition unit and at least one pyrotechnic charge, wherein the pyrotechnic component is arranged such in that the hot gas which can be generated by the latter is directed onto the at least one connecting element, and wherein the at least one connecting element can be weakened by the hot gas which can be generated by the at least one pyrotechnic component such that the pushing element can be separated from the actuator.

Eine bevorzugte Ausführungsform der Vorrichtung ist dadurch gekennzeichnet, dass das Verbindungselement von dem Heißgas wenigstens teilweise um- und/oder durchströmbar ist.A preferred embodiment of the device is characterized in that the connecting element of the hot gas is at least partially um- and / or flowed through.

Vorzugsweise ist das Verbindungselement als Hohlniet ausgebildet. Alternativ kann das Verbindungselement durch andere Bauteile gebildet sein, die vorzugsweise eine wenigstens teilweise durchgängige Öffnung aufweisen, durch die das von dem pyrotechnischen Bauteil erzeugbare Heißgas durch- und/oder durchströmbar ist. Vorzugsweise weist das Verbindungselement eine große Kontaktfläche gegenüber dem Heißgas auf.Preferably, the connecting element is designed as a hollow rivet. Alternatively, the connecting element may be formed by other components, which preferably have an at least partially continuous opening, through which the hot gas which can be generated by the pyrotechnic component can be flowed through and / or through. Preferably, the connecting element has a large contact surface with respect to the hot gas.

Eine weitere bevorzugte Ausführungsform der Vorrichtung ist dadurch gekennzeichnet, dass das Verbindungselement durch das von dem pyrotechnischen Bauteil erzeugbare Heißgas derart verformbar ist, dass der Aktuatoren axialer Richtung unabhängig von dem Schubelement bewegbar ist. Das von dem pyrotechnischen Bauteil erzeugbare Heißgas ist vorzugsweise derart auf das Verbindungselement gerichtet, dass dieses sich entweder derart verformt, was die durch das Verbindungselement gebildete mechanische Verbindung zwischen dem Schubelement und dem Aktuator getrennt wird, oder dass das Verbindungselement durch das Heißgas schmilzt oder verdampft und somit die mechanische Verbindung zwischen dem Schubelement und dem Aktuator löst.A further preferred embodiment of the device is characterized in that the connecting element can be deformed by the hot gas that can be generated by the pyrotechnic component in such a way that the axial direction of the actuator can be moved independently of the pushing element. The hot gas which can be generated by the pyrotechnic component is preferably directed onto the connecting element in such a way that it deforms in such a way as to separate the mechanical connection between the pushing element and the actuator formed by the connecting element, or the connecting element melts or evaporates through the hot gas and thus solves the mechanical connection between the thrust element and the actuator.

Eine weitere bevorzugte Ausführungsform der Vorrichtung ist dadurch gekennzeichnet, dass der Aktuator eine Spindel aufweist, die durch den Aktuator in axialer Richtung bewegbar ist.A further preferred embodiment of the device is characterized in that the actuator has a spindle which is movable in the axial direction by the actuator.

Vorzugsweise ist die Spindel als Hohlspindel, Hohlkolben oder Vollspindel ausgebildet.Preferably, the spindle is designed as a hollow spindle, hollow piston or full spindle.

Eine bevorzugte Ausführungsform der Vorrichtung ist dadurch gekennzeichnet, dass das wenigstens eine Verbindungselement zwischen der Spindel und dem Schubelement angeordnet ist. Das Schubelement ist über wenigstens ein Verbindungselement mit der Spindel mechanisch verbunden, so dass eine axiale Bewegung der Spindel auf der Schubelement direkt Übertragen wird.A preferred embodiment of the device is characterized in that the at least one connecting element between the spindle and the thrust element is arranged. The thrust element is mechanically connected via at least one connecting element with the spindle, so that an axial movement of the spindle is transmitted directly to the thrust element.

Eine weitere bevorzugte Ausführungsform der Vorrichtung ist dadurch gekennzeichnet, dass mehrere Verbindungselemente zwischen dem Aktuator bzw. der Spindel und dem Schubelement angeordnet sind. Vorzugsweise sind die Verbindungselemente hierbei in radialer oder axialer Richtung um den Verbindungsbereich zwischen Aktuator bzw. Spindel und dem Schubelement angeordnet.A further preferred embodiment of the device is characterized in that a plurality of connecting elements between the actuator or the spindle and the thrust element are arranged. Preferably, the connecting elements are arranged in this case in the radial or axial direction about the connection region between the actuator or spindle and the thrust element.

Eine bevorzugte Ausführungsform der Vorrichtung ist dadurch gekennzeichnet, dass jedes Verbindungselement jeweils einen pyrotechnischen Bauteil zugeordnet ist.A preferred embodiment of the device is characterized in that each connecting element is assigned in each case a pyrotechnic component.

Eine weitere bevorzugte Ausführungsform der Vorrichtung ist dadurch gekennzeichnet, dass mehrere Verbindungselemente einem pyrotechnischen Bauteil zugeordnet sind. Vorzugsweise ist das von dem pyrotechnischen Bauteil erzeugbare Heißgas auf mehrere Verbindungselemente leitbar. Das von dem pyrotechnischen Bauteil erzeugbare Heißgas wird vorzugsweise durch ein oder mehrere Strahlumlenkungen auf die jeweiligen Verbindungselemente geleitet.A further preferred embodiment of the device is characterized in that a plurality of connecting elements are associated with a pyrotechnic component. Preferably, the hot gas that can be generated by the pyrotechnic component can be conducted to a plurality of connecting elements. The hot gas that can be generated by the pyrotechnic component is preferably directed onto the respective connecting elements by one or more beam deflections.

Eine weitere bevorzugte Ausführungsform der Vorrichtung ist dadurch gekennzeichnet, dass das Verbindungselement und/oder das pyrotechnische Bauteil durch wenigstens ein Dichtungselement nach außen hin abgedichtet sind.A further preferred embodiment of the device is characterized in that the connecting element and / or the pyrotechnic component are sealed by at least one sealing element to the outside.

Eine bevorzugte Ausführungsform der Vorrichtung ist dadurch gekennzeichnet, dass das Schubelement als Schubstange oder Schubrohr ausgebildet ist.A preferred embodiment of the device is characterized in that the thrust element is designed as a push rod or push tube.

Eine weitere bevorzugte Ausführungsform der Vorrichtung ist dadurch gekennzeichnet, dass der Aktuator mit dem Schubelement wenigstens durch Reaktivierung des pyrotechnischen Bauteils und durch Anbringen wenigstens eines neuen Verbindungselements wieder verbindbar ist. Die Vorrichtung ist vorzugsweise derart ausgebildet, dass das durch das Heißgas verformte bzw. ausgeschmolzene oder verdampfte Verbindungselement durch ein neues Verbindungselement ersetzt werden kann. Das pyrotechnische Bauteil ist vorzugsweise ebenfalls derart ausgebildet, dass wenigstens die pyrotechnische Ladung und gegebenenfalls die Zündeinheit ausgetauscht bzw. erneuert werden müssen. Die voneinander getrennten Schubelement und Spindel bzw. Aktuator können somit leicht wieder mechanisch miteinander verbunden werden.A further preferred embodiment of the device is characterized in that the actuator with the thrust element at least by reactivation of the pyrotechnic component and by attaching at least one new connecting element is connectable again. The device is preferably designed in such a way that the connecting element deformed or melted out or vaporized by the hot gas can be replaced by a new connecting element. The pyrotechnic component is preferably also designed such that at least the pyrotechnic charge and possibly the ignition unit must be replaced or renewed. The separate thrust element and spindle or actuator can thus be easily mechanically interconnected again.

Besonders bevorzugt eignet sich die zuvor beschriebene Vorrichtung zur Verwendung zur Steuerung einer Taumelscheibe, wie sie beispielsweise zum Richtungssteuerung eines Helikopters verwendet wird, wobei die Steuerung in jede Richtung jeweils mindestens zwei zuvor beschriebene Vorrichtungen aufweist. Bei Blockierung einer der beiden Vorrichtungen pro angesteuerte Richtung ist die blockierte Vorrichtung durch Aktivierung des pyrotechnischen Bauteils trennbar. Durch Trennung der blockierten Vorrichtung ist die zweite Vorrichtung zur Ansteuerung der Taumelscheibe weiterhin verwendbar.Particularly preferably, the device described above is suitable for use in controlling a Swash plate, as used for example for direction control of a helicopter, wherein the controller has in each direction at least two devices described above. When blocking one of the two devices per driven direction, the blocked device is separable by activation of the pyrotechnic component. By separating the blocked device, the second device for controlling the swash plate is still usable.

Vorzugsweise eignet sich die zuvor beschriebene Vorrichtung insbesondere bei redundant, beispielsweise doppelt ausgelegten, beispielsweise axial bewegbaren Maschinenelementen, um einen Totalausfall der Maschine bei Blockade einer der beiden Vorrichtungen zu vermeiden.Preferably, the device described above is particularly suitable for redundant, for example, double-dimensioned, for example, axially movable machine elements in order to avoid a total failure of the machine in blockade of one of the two devices.

Der Vorteil der erfindungsgemäßen Vorrichtung zur mechanischen Verbindung eines Aktuators mit einem von dem Aktuator axial angetriebenen Schubelement besteht darin, dass diese durch den oben beschriebenen Aufbau weniger störanfällig gegenüber Verschmutzungen, Korrosion, Verschleiß der Baugruppen bzw. gegenüber Änderungen des Reibfaktors der Kugeln oder Klauen zueinander und dadurch eine höhere Zuverlässigkeit aufweist.The advantage of the device according to the invention for the mechanical connection of an actuator with an axially driven by the actuator thrust element is that they are less susceptible to contamination, corrosion, wear of the assemblies or to changes in the coefficient of friction of the balls or jaws to each other and by the above-described construction thereby having a higher reliability.

Weitere Vorteile, Merkmale und Einzelheiten der Erfindung ergeben sich aus der nachfolgenden Beschreibung, in der unter Bezugnahme auf die Zeichnungen ein Ausführungsbeispiel im Einzelnen beschrieben ist.Further advantages, features and details of the invention will become apparent from the following description in which, with reference to the drawings, an embodiment is described in detail.

Es zeigen:Show it:

Figur 1FIG. 1
eine erste Ausführungsform der erfindungsgemäßen Vorrichtung, unda first embodiment of the device according to the invention, and
Figur 2FIG. 2
eine weitere Ausführungsform der erfindungsgemäßen Vorrichtung.a further embodiment of the device according to the invention.

In Figur 1 ist eine erste Ausführungsform der erfindungsgemäßen Vorrichtung 1 dargestellt.In FIG. 1 a first embodiment of the device 1 according to the invention is shown.

Die erfindungsgemäße Vorrichtung weist auf einen Aktuator, ein Schubelement, das axial von dem Aktuator angetrieben wird, wenigstens ein Verbindungselement, das den Aktuator und das Schubelement verbindet, und das zwischen dem Aktuator und dem Schubelement angeordnet ist, wenigstens ein pyrotechnisches Bauteil, aufweisend wenigstens eine Zündeinheit und wenigstens eine pyrotechnische Ladung, wobei das pyrotechnische Bauteil derart angeordnet ist, dass das von diesem erzeugbare Heißgas auf das wenigstens eine Verbindungselement gerichtet ist, und wobei das wenigstens eine Verbindungselement durch das von dem wenigstens einen pyrotechnischen Bauteil erzeugbare Heißgas derart schwächbar ist, dass das Schubelement von dem Aktuator trennbar ist.The device according to the invention comprises an actuator, a thrust element which is driven axially by the actuator, at least one connecting element which connects the actuator and the thrust element and which is arranged between the actuator and the thrust element, at least one pyrotechnic component comprising at least one Ignition unit and at least one pyrotechnic charge, wherein the pyrotechnic component is arranged such that the hot gas produced by this is directed to the at least one connecting element, and wherein the at least one connecting element is weakened by the at least one pyrotechnic component generated by the hot gas such that the push element is separable from the actuator.

In der Vorrichtung 1 wird ein mechanischer Aktuator 2 mit einem Schubelement 3 in axialer Richtung derart verbunden, dass bei einer axialen Bewegung des beweglichen Teils des Aktuators 2, der in der dargestellten Ausführungsform durch eine Spindel 21 gebildet ist, das Schubelement 3 axial mit bewegt wird. Der Aktuator 2 umfasst einen ortsfesten Antrieb 22 und eine in axialer Richtung bewegliche Spindel 21. Die Spindel 21 ist in der dargestellten Ausführungsform als Hohlspindel ausgebildet. Die Spindel 21 ist mit einem Schubelement 3 in Form einer Schubstange 31 mechanisch über ein Verbindungselement 4 verbunden. Die Schubstange 31 ist teilweise in einer Bohrung in der Hohlspindel 21 angeordnet. In der dargestellten Ausführungsform ist die Schubstange 31 nur mittels eines Verbindungselements 4 mit der Spindel 21 verbunden. Die Vorrichtung kann auch mehrere Verbindungselemente 4 aufweisen, die die Spindel 21 mit dem Schubelement 3 verbinden. Der Antrieb 22 kann beispielsweise als Rollengewindeantrieb ausgebildet sein.In the device 1, a mechanical actuator 2 with a thrust element 3 in the axial direction is connected such that upon axial movement of the movable part of the actuator 2, which is formed in the illustrated embodiment by a spindle 21, the thrust element 3 is moved axially , The actuator 2 comprises a fixed drive 22 and a spindle movable in the axial direction 21. The spindle 21 is formed in the illustrated embodiment as a hollow spindle. The spindle 21 is mechanically connected to a push element 3 in the form of a push rod 31 via a connecting element 4. The push rod 31 is partially disposed in a bore in the hollow spindle 21. In the illustrated embodiment, the push rod 31 is connected to the spindle 21 only by means of a connecting element 4. The device may also have a plurality of connecting elements 4, which connect the spindle 21 with the thrust element 3. The drive 22 may be formed, for example, as a roller screw drive.

Vorzugsweise ist die Vorrichtung 1 dort einsetzbar, wo eine mechanische Ansteuerung mittels eines axial angetriebenen Schubelements 3 über einen Aktuator 2 redundant ausgelegt ist. Bei der Blockade einer dieser Schubelemente 3 ist das oder die weiteren Schubelemente 3 ebenfalls blockiert. Um eine Blockade des noch frei funktionierenden Schubelements 3 zu verhindern, weist die Vorrichtung 1 ein pyrotechnisches Bauteil 5 auf. Das pyrotechnische Bauteil 5 weist eine Zündeinheit 51 auf, mittels der wenigstens eine pyrotechnische Ladung 52 aktivierbar ist. Die pyrotechnische Ladung 52 erzeugt bei Aktivierung ein sehr heißes Gas mit hohem Druck. Das pyrotechnische Bauteil 5 ist derart ausgebildet, dass das von der aktivierten pyrotechnischen Ladung 52 erzeugt heiße Gas in Richtung auf das Verbindungselement 4 gerichtet ist. Das heiße Gas um- und/oder durchströmt das Verbindungselement 4, so dass dieses sich derart verformt oder wenigstens teilweise auflöst, dass die mechanische Verbindung zwischen der Spindel 21 und der Schubstange 31 unterbrochen wird. Nach der Trennung der Schubstange 31 von der Spindel 21 ist das redundant ausgelegte Schubelement wieder frei beweglich und die Ansteuerung ist nicht mehr blockiert. Das Verbindungselement 4 ist beispielsweise als Hohlniet ausgebildet, durch das das heiße Gas leicht durchströmen kann. Vorzugsweise ist wenigstens das Verbindungselement 4 nach außen hin durch ein Dichtungselement abgedichtet, so dass kein Schmutz in z.B. das Hohlniet eindringen kann und ein Aufschmelzen verhindern kann.Preferably, the device 1 can be used where a mechanical control by means of an axially driven thrust element 3 via an actuator 2 is designed to be redundant. In the blockade of one of these thrust elements 3 or the other thrust elements 3 is also blocked. In order to prevent a blockage of the still freely functioning thrust element 3, the device 1 has a pyrotechnic component 5. The pyrotechnic component 5 has an ignition unit 51, by means of which at least one pyrotechnic charge 52 can be activated. The pyrotechnic charge 52 generates a very hot gas at high pressure when activated. The pyrotechnic component 5 is designed in such a way that the hot gas generated by the activated pyrotechnic charge 52 is directed in the direction of the connecting element 4. The hot gas flows around and / or flows through the connecting element 4, so that it deforms or at least partially dissolves in such a way that the mechanical connection between the spindle 21 and the push rod 31 is interrupted. After the separation of the push rod 31 of the spindle 21, the redundant thrust element is freely movable again and the control is no longer blocked. The connecting element 4 is designed, for example, as a hollow rivet, through which the hot gas can easily flow. Preferably, at least the connecting element 4 is sealed to the outside by a sealing element, so that no dirt in eg the rivet can penetrate and can prevent melting.

Zur Aktivierung der Zündeinrichtung 51 weist das pyrotechnische Bauteil 5 ein oder mehrere Kontaktanschlüsse 54 auf. Vorzugsweise ist das pyrotechnische Bauteil 5 nach außen hin gegen eindringende Verunreinigungen abgedichtet.To activate the ignition device 51, the pyrotechnic component 5 has one or more contact connections 54. Preferably, the pyrotechnic component 5 is sealed to the outside against penetrating impurities.

In Figur 2 ist eine weitere Ausführungsform der erfindungsgemäßen Vorrichtung 1 dargestellt. Bei der in Figur 2 dargestellten Ausführungsform der Vorrichtung 1 ist die Spindel 21 als Vollspindel ausgeführt und ist ortsfest angeordnet. Die Spindel 21 bewegt sich nicht in axialer Richtung sondern weist nur eine Rotationsbewegung auf. Die Spindel 21 wird durch einen Antrieb 22 angetrieben. Auf der Spindel 21 ist ein Spindelelement 23 angeordnet, das bei Rotation der Spindel 21 axial bewegbar ist. Das Spindelelement 23 ist über ein oder mehrere Verbindungselemente 4 mit einem Schubelement 3, in der Form eines Schubrohrs 32 verbunden. Bei einer axialen Bewegung des Spindelelements 23 durch Rotation der Spindel 21 wird das Schubrohr 23 axial mit bewegt. Zur Trennung der Verbindung zwischen dem Spindelelement 23 und dem Schubrohr 32 weist die Vorrichtung 1 ein oder mehrere pyrotechnische Bauteile 5 auf. Bei Aktivierung der Zündeinheit 51 erzeugt die pyrotechnische Ladung 52 des pyrotechnischen Bauteils 5 heiße Gase. Die heißen Gase werden u.a. durch eine oder mehrere Strahlumlenkungen 53 auf das Verbindungselement 4 geleitet. Des Weiteren sorgen die Strahlumlenkungen 53 dafür, dass die Spindel 21 durch die heißen Gase nicht beschädigt wird. Durch die heißen Gase des pyrotechnischen Bauteils 5 wird das Verbindungselement 4 derart verformt bzw. aufgelöst, dass die mechanische Verbindung zwischen dem Schubrohr 32 und dem Spindelelement 23 und somit zu der Spindel 21 getrennt wird.In FIG. 2 a further embodiment of the device 1 according to the invention is shown. At the in FIG. 2 illustrated embodiment of the device 1, the spindle 21 is designed as a full spindle and is arranged stationary. The spindle 21 does not move in the axial direction but has only one rotational movement. The spindle 21 is driven by a drive 22. On the spindle 21, a spindle member 23 is arranged, which is axially movable during rotation of the spindle 21. The spindle element 23 is connected via one or more connecting elements 4 with a pushing element 3, in the form of a push tube 32. In an axial movement of the spindle member 23 by rotation of the spindle 21, the torque tube 23 is moved axially. In order to separate the connection between the spindle element 23 and the torque tube 32, the device 1 has one or more pyrotechnic components 5. Upon activation of the ignition unit 51, the pyrotechnic charge 52 of the pyrotechnic component 5 generates hot gases. The hot gases are, inter alia, by one or more beam deflections 53 on the connecting element 4th directed. Furthermore, the beam deflectors 53 ensure that the spindle 21 is not damaged by the hot gases. Due to the hot gases of the pyrotechnic component 5, the connecting element 4 is deformed or dissolved such that the mechanical connection between the torque tube 32 and the spindle element 23 and thus to the spindle 21 is separated.

Das Verbindungselement 4 bzw. das pyrotechnische Bauteil 5 sind vorzugsweise mittels Dichtungselementen 6 gegen eindringende Verunreinigungen abgedichtet.The connecting element 4 or the pyrotechnic component 5 are preferably sealed off by sealing elements 6 against penetrating impurities.

Um die Vorrichtung wieder zu Reaktivieren reicht es aus, wenn das pyrotechnische Bauteil 5, etwa durch einbringen einer neuen pyrotechnischen Ladung 52 reaktiviert wird und ein bzw. mehrere neue Verbindungselemente 4 zwischen Spindel 21 bzw. Spindelelement 23 und Schubelement 3 eingepasst werden.
Die Vorrichtung 1 eignet sich vorzugsweise zur Trennung von mechanisch miteinander verbundenen Bauteilen, die schnell voneinander getrennt werden müssen. Vorzugsweise eignet sich die Vorrichtung bei einer redundant ausgelegten Ansteuerung beispielsweise einer Taumelscheibe eines Helikopters, um eine Blockierung der redundant ausgelegten Ansteuerungen zu verhindern.In order to reactivate the device, it is sufficient if the pyrotechnic component 5 is reactivated, for example by introducing a new pyrotechnic charge 52, and one or more new connecting elements 4 are fitted between spindle 21 or spindle element 23 and thrust element 3.
The device 1 is preferably suitable for the separation of mechanically interconnected components that must be quickly separated from each other. Preferably, the device is in a redundant drive, for example, a swash plate of a helicopter to prevent blocking of the redundant controls.

BezugszeichenlisteLIST OF REFERENCE NUMBERS

11
Vorrichtungcontraption
22
Aktuatoractuator
2121
Spindelspindle
2222
Antriebdrive
2323
Spindelelementspindle element
33
Schubelementpush element
3131
Schubstangepushrod
3232
Schubrohrtorque tube
44
Verbindungselementconnecting element
55
pyrotechnisches Bauteilpyrotechnic component
5151
Zündeinheitignition unit
5252
pyrotechnische Ladungpyrotechnic charge
5353
Strahlumlenkungbeam deflection
5454
KontaktanschlussContact Termination
66
Dichtungselementsealing element

Claims (15)

  1. Device comprising an actuator (2), a thrust element (3) which is axially driven by the actuator (2), at least one connecting element (4) which connects the actuator (2) and the thrust element (3) and which is arranged between the actuator (2) and the thrust element (3), at least one pyrotechnic component (5) comprising at least one ignition unit (51) and at least one pyrotechnic charge (52), wherein the pyrotechnic component (5) is arranged in such a manner that the hot gas producible thereby is directed towards the at least one connecting element (4), and wherein the at least one connecting element (4) can be weakened by the hot gas producible by the at least one pyrotechnic component (5) in such a manner that the thrust element (3) is separable from the actuator (2).
  2. Device according to claim 1 in which the hot gas can at least partially flow around and/or through the connecting element (4).
  3. Device according to claim 2 in which the connecting element (4) is configured in the form of a tubular rivet.
  4. Device according to any of the preceding claims in which the connecting element (4) is deformable by the hot gas producible by the pyrotechnic component (5) in such a manner that the actuator (2) is movable in the axial direction independently of the thrust element (3).
  5. Device according to any of the preceding claims in which the actuator (2) has a spindle (21) which is movable in the axial direction by means of the actuator (2).
  6. Device according to claim 5 in which the spindle (21) is configured in the form of a hollow spindle, a hollow piston or a solid spindle.
  7. Device according to any of claims 4 or 5 in which the at least one connecting element (4) is arranged between the spindle (21) and the thrust element (3).
  8. Device according to any of the preceding claims in which a plurality of connecting elements (4) is arranged between the actuator (2) or the spindle (21) and the thrust element (3).
  9. Device according to claim 8 in which each connecting element (4) is assigned to one pyrotechnic component (5).
  10. Device according to claim 8 in which a plurality of connecting elements (4) is assigned to one pyrotechnic component (5).
  11. Device according to claim 10 in which the hot gas producible by the pyrotechnic component (5) can be conducted to a plurality of connecting elements (4).
  12. Device according to any of the preceding claims in which the connecting element (4) and/or the pyrotechnic component (5) are sealed towards the outside by means of at least one sealing element (6).
  13. Device according to any of the preceding claims in which the thrust element (3) is configured in the form of a thrust rod (31) or a thrust tube (32).
  14. Device according to any of the preceding claims in which the actuator (2) can be reconnected to the thrust element (3) at least by reactivating the pyrotechnic component (5) and by attaching at least one new connecting element (4).
  15. Use of the device according to any of the preceding claims for controlling a swash plate in which the control system has at least two devices (1) in each direction, wherein in the event of blocking of one of the two devices (1) for each direction, the blocked device (1) is separable by activating the pyrotechnic component (5).
EP12165898.3A 2011-04-27 2012-04-27 Pyrotechnically weakenable connection between two elements Not-in-force EP2522948B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102011018667.0A DE102011018667B4 (en) 2011-04-27 2011-04-27 Device for the mechanical connection of an actuator with an axially driven by an actuator thrust element

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EP2522948A2 EP2522948A2 (en) 2012-11-14
EP2522948A3 EP2522948A3 (en) 2015-05-20
EP2522948B1 true EP2522948B1 (en) 2017-02-22

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Publication number Priority date Publication date Assignee Title
DE102015213226A1 (en) * 2015-07-15 2017-01-19 Zf Friedrichshafen Ag Control rod for adjusting a rotor blade of a helicopter

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US2732765A (en) * 1956-01-31 Squib gun
DE918004C (en) * 1952-04-09 1954-09-16 Murdo Mackenzie Rotor for helicopter u. like
DE970775C (en) * 1952-12-22 1958-10-30 Vickers Armstrongs Ltd Connection for two parts to be separated by means of an explosive bolt
US2858726A (en) * 1955-02-14 1958-11-04 Boeing Co Explosively releasable nut having a weakened line of material
US3114962A (en) * 1961-12-21 1963-12-24 Hi Shear Corp Separable fastener and parts catcher therefor
US6561074B1 (en) * 1977-07-28 2003-05-13 Raytheon Company Shipboard point defense system and elements therefor
DE10127483B4 (en) * 2001-06-07 2014-02-13 Magna Electronics Europe Gmbh & Co.Kg Separating screw and its use
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US3024592A (en) * 1960-11-09 1962-03-13 Lockheed Aircraft Corp Pin actuating device
WO2002035305A2 (en) * 2000-10-25 2002-05-02 Lockheed Martin Corporation Explosive-bolt-activated spring-loaded actuation device

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DE102011018667B4 (en) 2017-05-04
DE102011018667A1 (en) 2012-10-31
DE202011110665U1 (en) 2015-06-30
EP2522948A3 (en) 2015-05-20
EP2522948A2 (en) 2012-11-14

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